One-way valve of suction machine and pipeline structure comprising one-way valve

Abstract

The utility model relates to the technical field of suction machines, in particular to a one-way valve of a suction machine and a pipeline structure with the one-way valve, which comprises a valve casing, a sliding valve core is in sealing sliding fit in a valve cavity of the valve casing, and the sliding valve core is plugged on the inner side of an air outlet port on the side portion of the valve casing. The sliding valve element is connected to the end, inserted into a valve cavity of the valve shell, of the valve shaft, the middle of the valve shaft is slidably arranged in a center channel of a closed end seat of the valve shell in a sealed mode, and a compression spring is arranged between the sliding valve element and the inner side face of the closed end seat of the valve shell. The end, penetrating out of the valve shell, of the valve shaft is connected with the valve shell through a pressure adjusting structure. An air inlet port is formed in the open end of the valve shell, and the air inlet port and the compression spring are located on the two sides of the air outlet port. Through the arrangement of the pressure regulating mechanism, the aim of accurately regulating and controlling the opening and closing threshold value of the valve element by disassembling the one-way valve and replacing the compression spring is achieved, the adaptability to different working conditions is improved, and the problem that the opening pressure of a traditional one-way valve cannot be regulated is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of suction machine technology, and more specifically, to a one-way valve for a suction machine and a pipeline structure containing the one-way valve. Background Technology

[0002] In suction machines, the check valve, as a core component controlling the unidirectional flow of gas, directly affects the equipment's efficiency and stability. Traditional check valves often employ a fixed structure, using a pre-set spring force to control the opening and closing of the gas passage. However, this design has significant limitations in practical applications: Firstly, the opening pressure of the check valve is determined by the spring preload, and the spring parameters are fixed and cannot be adjusted, making it difficult for the valve body to adapt to different gas pressures, flow rates, or changing operating conditions. For example, when the suction machine handles high-viscosity media or requires gas flow rate adjustment, a check valve with a fixed opening pressure is prone to problems such as response lag, gas backflow, or overload blockage, severely restricting the equipment's applicability and operational reliability.

[0003] Secondly, adjusting the opening pressure of existing check valves typically requires replacing the spring with one of different specifications or adjusting the spring pre-compression, a cumbersome process that relies on manual experience. Frequent disassembly and assembly not only increases maintenance costs but may also lead to secondary malfunctions due to component wear or decreased sealing. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a one-way valve for a suction machine and a pipeline structure containing the one-way valve.

[0005] The technical solution adopted in this utility model is:

[0006] A one-way valve for a suction machine includes: a valve housing; a sliding valve core that is sealed and slidably fitted inside the valve cavity of the valve housing; the sliding valve core is sealed inside the air outlet port on the side of the valve housing; the sliding valve core is connected to one end of a valve shaft inserted into the valve cavity of the valve housing; the middle part of the valve shaft is sealed and slidably disposed in the central channel of the closed end seat of the valve housing; a compression spring is provided between the sliding valve core and the inner side of the closed end seat of the valve housing; one end of the valve shaft extending outside the valve housing is connected to the valve housing through a pressure regulating structure; the open end of the valve housing is provided with an air inlet port; the air inlet port and the compression spring are located on both sides of the air outlet port.

[0007] Furthermore, the inner wall of the valve housing is provided with an annular protrusion, which is fitted inside the air outlet port; the sliding valve core includes a sliding seat and a valve core body; one end of the sliding seat is connected to the valve shaft, and the other end of the sliding seat is connected to the valve core body used to seal inside the air outlet port; the diameter of the sliding seat is larger than the diameter of the valve core body, and the sliding seat is engaged on the end face of the annular protrusion near the closed end seat.

[0008] Furthermore, the two ends of the compression spring abut against the inner surfaces of the sliding seat and the closed end seat.

[0009] Furthermore, a compression spring is fitted onto the valve shaft.

[0010] Furthermore, a control bolt is threaded onto the closed end seat, and the valve shaft is provided with a long-closed socket and a long-open socket along its axial direction for insertion and mating with the control bolt. The long-open socket is located between the long-closed socket and the air outlet port. When the control bolt is inserted into the long-closed socket, the sliding valve core always remains in a state of sealing at the air outlet port. When the control bolt is inserted into the long-open socket, the sliding valve core always remains in a state of releasing the sealing at the air outlet port.

[0011] Furthermore, the one-way valve of the suction machine further includes: a flow control nut threadedly connected to one end of the valve shaft extending to the outside of the valve housing, the flow control nut being secured to the outer surface of the closed end seat.

[0012] Furthermore, the flow control nut is connected to a tightening screw on its side thread, and the tightening screw abuts against the external thread surface of the valve shaft.

[0013] Furthermore, the pressure regulating structure includes: a pressure seat fixed to one end of the valve shaft extending out of the valve housing, and the pressure seat is connected to the outer side of the closed end seat by one or more pressure tension spring assemblies.

[0014] Furthermore, the pressure spring assembly includes: a fixed seat plate fixed to the outer side of the closed end seat, the fixed seat plate being connected to the movable seat plate via a tension spring, a short shaft on the movable seat plate being inserted into the longitudinal insertion hole of the pressure seat, and a transverse screw threaded on the pressure seat being inserted into the transverse through hole on the side of the short shaft.

[0015] The piping structure includes a one-way valve for a suction machine as described in any of the preceding claims, and further includes an air inlet pipe connected to the air inlet port of the one-way valve and an air outlet pipe connected to the air outlet port of the one-way valve.

[0016] As can be seen from the above solution, the beneficial effects of this utility model are as follows:

[0017] In this utility model, a one-way valve for a suction machine and a pipeline structure containing the one-way valve are provided. Not only is a compression spring provided between the sliding valve core and the inner side of the closed end seat of the valve shell, but a pressure regulating structure is also provided between the end of the valve shaft that extends out of the valve shell and the valve shell. By setting the pressure regulating mechanism, the goal of accurately adjusting the valve core opening and closing threshold can be achieved by disassembling the one-way valve and replacing the compression spring. This improves the adaptability to different working conditions and effectively solves the problems of non-adjustable opening pressure and complex maintenance of traditional one-way valves, thus providing a guarantee for the efficient operation of the suction machine under complex working conditions.

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 A schematic diagram of a one-way valve provided in an embodiment of this utility model;

[0021] Figure 2 Cross-sectional view of the one-way valve provided in the embodiment of this utility model Figure 1 ;

[0022] Figure 3 Cross-sectional view of the one-way valve provided in the embodiment of this utility model Figure 2 ;

[0023] Figure 4 A cross-sectional view of the valve housing provided in an embodiment of this utility model;

[0024] Figure 5 A schematic diagram of the sliding valve core provided in an embodiment of this utility model;

[0025] Figure 6 A schematic diagram of the valve shaft provided for an embodiment of this utility model;

[0026] Figure 7 A schematic diagram of the voltage regulating structure provided in an embodiment of this utility model.

[0027] Icons: Valve housing 1; Annular protrusion 101; Sliding valve core 2; Sliding seat 201; Valve core body 202; Air outlet port 3; Valve shaft 4; Closed end seat 5; Compression spring 6; Pressure regulating structure 7; Pressure seat 701; Fixed seat plate 702; Tension spring 703; Moving seat plate 704; Short shaft 705; Air inlet port 8; Fixed control bolt 9; Long closed socket 10; Long open socket 11; Flow control nut 12; Tightening screw 13. Detailed Implementation

[0028] To ensure a clear and complete description of the technical solutions in the embodiments of this utility model below, in conjunction with the accompanying drawings, it is evident that the described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0029] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0030] Example 1

[0031] Please see Figures 1-7 This utility model provides a one-way valve for a suction machine, comprising: a valve housing 1, a sliding valve core 2 sealed and slidably fitted inside the valve cavity of the valve housing 1, the sliding valve core 2 being sealed inside the air outlet port 3 on the side of the valve housing 1, the sliding valve core 2 being connected to one end of a valve shaft 4 inserted into the valve cavity of the valve housing 1, the middle part of the valve shaft 4 being sealed and slidably mounted in the central channel of the closed end seat 5 of the valve housing 1, a compression spring 6 being provided between the sliding valve core 2 and the inner side of the closed end seat 5 of the valve housing 1; one end of the valve shaft 4 extending out of the valve housing 1 being connected to the valve housing 1 through a pressure regulating structure 7; an air inlet port 8 being provided at the open end of the valve housing 1, the air inlet port 8 and the compression spring 6 being located on both sides of the air outlet port 3.

[0032] The working principle and technical effects of the above technical solution are as follows:

[0033] This invention provides a one-way valve for a suction machine. In the initial state, the compression spring 6 is under a certain compression, generating a thrust on the sliding valve core 2, causing the sliding valve core 2 to tightly seal the inside of the air outlet port 3 on the side of the valve housing 1. At this time, the one-way valve is in the closed state. When gas enters the valve cavity of the valve housing 1 from the air inlet port 8, the gas generates a pressure on the sliding valve core 2 towards the closed end seat 5. As the pressure of the incoming gas gradually increases, when the gas pressure overcomes the elastic force of the compression spring 6, the sliding valve core 2 slides along the valve cavity towards the closed end seat 5 under the action of the gas pressure, causing the compression spring 6 to... The gas is compressed in one step; when the sliding valve core 2 slides to release the blockage of the outlet port 3, the gas can flow out from the outlet port 3, realizing one-way gas flow; when the gas pressure at the inlet port 8 decreases and is less than the elastic force of the compression spring 6, the compression spring 6 pushes the sliding valve core 2 to slide away from the closed end seat 5 until the sliding valve core 2 blocks the outlet port 3 again, the one-way valve closes, and prevents gas backflow; the end of the valve shaft 4 that extends out of the valve housing 1 is connected to the valve housing 1 through the pressure regulating structure 7. The opening pressure of the one-way valve can be changed by adjusting the pressure regulating structure 7, which can be adjusted according to different gas flow conditions. Under different working conditions, by adjusting the opening pressure, it can better adapt to various gas delivery needs, improving the applicability and working efficiency of the suction machine. For example, in working conditions where higher pressure is required to achieve effective gas delivery, the opening pressure can be increased by adjusting the pressure regulating structure 7.

[0034] Example 2

[0035] Please see Figures 1-7This utility model provides a one-way valve for a suction machine. The valve housing 1 has an annular protrusion 101 on its inner wall, which is fitted inside the air outlet port 3. The sliding valve core 2 includes a sliding seat 201 and a valve core body 202. One end of the sliding seat 201 is connected to the valve shaft 4, and the other end is connected to the valve core body 202, which is used to seal the inside of the air outlet port 3. The diameter of the sliding seat 201 is larger than the diameter of the valve core body 202, and the sliding seat 201 is engaged on the end face of the annular protrusion 101 near the closed end seat 5. The two ends of a compression spring 6 abut against the inner surfaces of the sliding seat 201 and the closed end seat 5. The compression spring 6 is sleeved on the valve shaft 4.

[0036] The working principle and technical effects of the above technical solution are as follows:

[0037] This utility model provides a one-way valve for a suction machine, wherein the inner wall of the valve housing 1 is provided with an annular protrusion 101, the diameter of the sliding seat 201 is larger than the diameter of the valve core body 202, and the sliding seat 201 is engaged on the end face of the annular protrusion 101 near the closed end seat 5, thereby limiting the position of the sliding seat 201 by the annular protrusion 101 and simultaneously limiting the position of the valve core body 202, preventing the sliding seat 201 and the valve core body 202 from moving between the air outlet port 3 and the air inlet port 8 under the elastic force of the compression spring 6, and ensuring the stability of the position of the valve core body 202 when it is closed to the air outlet port 3.

[0038] Example 3

[0039] Please see Figures 1-7 This utility model provides a one-way valve for a suction machine, wherein a fixed control bolt 9 is threadedly connected to the closed end seat 5, and a long-closed socket 10 and a long-open socket 11 are provided on the valve shaft 4 along its axial direction for insertion and engagement with the fixed control bolt 9. The long-open socket 11 is located between the long-closed socket 10 and the air outlet port 3. When the fixed control bolt 9 is inserted into the long-closed socket 10, the sliding valve core 2 always remains in a state of sealing the air outlet port 3. When the fixed control bolt 9 is inserted into the long-open socket 11, the sliding valve core 2 always remains in a state of releasing the sealing of the air outlet port 3.

[0040] The working principle and technical effects of the above technical solution are as follows:

[0041] This invention provides a one-way valve for a suction machine. When the control bolt 9 is not connected to either the permanently closed port 10 or the permanently open port 11, the one-way valve is in a one-way flow state. When the control bolt 9 is inserted into the permanently closed port 10, the sliding valve core 2 remains sealed at the outlet port 3. When the control bolt 9 is inserted into the permanently open port 11, the sliding valve core 2 remains unsealed at the outlet port 3. This allows the one-way valve of this invention to not only be used as a one-way valve but also to be switched between permanently closed and permanently open modes, adapting to more complex and varied working environments and process requirements. Users can flexibly select the working state of the one-way valve according to actual working conditions, rather than being limited to the conventional mode of automatic opening and closing controlled by gas pressure. This enhances the controllability of the entire suction machine system, enabling the system to better meet the personalized needs of different users and improving the versatility and practicality of the equipment.

[0042] The one-way valve of the suction machine further includes: a flow control nut 12 threadedly connected to one end of the valve shaft 4 extending to the outside of the valve housing 1, the flow control nut 12 being secured to the outer side of the closed end seat 5. A tightening screw 13 is threadedly connected to the side of the flow control nut 12, the tightening screw 13 engaging with the external thread surface of the valve shaft 4.

[0043] When the tightening screw 13 is rotated to disengage it from the external thread surface of the valve shaft 4, the relative position of the flow control nut 12 and the valve shaft 4 can be changed by rotating the flow control nut 12. When the distance between the flow control nut 12 and the sliding valve core 2 is reduced, the flow control nut 12 can be locked on the outer side of the closed end seat 5, so that the outlet port 3 is in a partially open normally open state, and the opening range can still be changed according to the gas pressure to meet the needs of more situations. After adjustment, the tightening screw 13 is engaged with the external thread surface of the valve shaft 4 to prevent the flow control nut 12 and the valve shaft 4 from loosening.

[0044] Example 4

[0045] Please see Figures 1-7 This utility model provides a one-way valve for a suction machine, wherein the pressure regulating structure 7 includes: a pressure seat 701 fixedly connected to one end of the valve shaft 4 extending to the outside of the valve housing 1, and the pressure seat 701 is connected to the outer side of the closed end seat 5 by one or more pressure spring assemblies. The pressure spring assembly includes: a fixed seat plate 702 fixedly connected to the outer side of the closed end seat 5, the fixed seat plate 702 being connected to a movable seat plate 704 by a tension spring 703, a short shaft 705 on the movable seat plate 704 being inserted into a longitudinal insertion hole in the pressure seat 701, and a transverse screw threaded on the pressure seat 701 being inserted into a transverse through hole on the side of the short shaft 705.

[0046] The working principle and technical effects of the above technical solution are as follows:

[0047] This utility model provides a pressure regulating structure 7 in the one-way valve of a suction machine, which makes the opening pressure of the one-way valve very convenient to adjust. The number of pressure spring assemblies installed between the outer side of the pressure seat 701 and the closed end seat 5 can be selected according to actual needs. The more pressure spring assemblies installed, the greater the opening pressure of the one-way valve, and vice versa. When the gas pressure causes the one-way valve to open, the sliding valve core 2 drives the valve shaft 4 to move outward. The valve shaft 4 drives the pressure seat 701 to move away from the closed end seat 5. At this time, the pressure seat 701 drives the moving seat plate 704 to stretch the tension spring 703 through the cooperation of the horizontal screw and the short shaft 705. The tension spring 703 is set to increase the opening pressure. The tension spring 703 is located outside the one-way valve, which is easy to replace. This makes it easy to change the opening pressure of the one-way valve and facilitates maintenance.

[0048] Example 5

[0049] Please see Figures 1-7 This utility model provides a pipeline structure for a one-way valve in a suction machine, including the aforementioned one-way valve, and further comprising: an air inlet pipe connected to the air inlet port 8 of the one-way valve and an air outlet pipe connected to the air outlet port 3 of the one-way valve. This pipeline structure can effectively meet various needs during the use of the suction machine and is highly practical.

[0050] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0051] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0052] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A one-way valve for an extractor, characterized in that include: The valve housing has a valve cavity with a sliding valve core that is sealed and slidably fitted. The sliding valve core is sealed inside the air outlet port on the side of the valve housing. The sliding valve core is connected to one end of the valve shaft that is inserted into the valve cavity of the valve housing. The middle part of the valve shaft is sealed and slidably mounted in the central channel of the closed end seat of the valve housing. A compression spring is provided between the sliding valve core and the inner side of the closed end seat of the valve housing. The end of the valve shaft that extends out of the valve housing is connected to the valve housing through a pressure regulating structure. The open end of the valve housing has an air inlet port, and the air inlet port and the compression spring are located on both sides of the air outlet port.

2. A one-way valve for a suction machine according to claim 1, characterized in that The valve housing has an annular protrusion on its inner wall, which is fitted inside the outlet port. The sliding valve core includes a sliding seat and a valve core body. One end of the sliding seat is connected to the valve shaft, and the other end of the sliding seat is connected to the valve core body used to seal inside the outlet port. The diameter of the sliding seat is larger than the diameter of the valve core body, and the sliding seat is engaged on the end face of the annular protrusion near the closed end seat.

3. A one-way valve for a suction machine according to claim 2, characterised in that, The two ends of the compression spring abut against each other on the inner surfaces of the sliding seat and the closed end seat.

4. A one-way valve for a suction machine according to claim 3, wherein A compression spring is fitted onto the valve shaft.

5. A one-way valve for a suction machine according to claim 1, characterized in that, The closed end seat is threaded with a control bolt. The valve shaft is provided with a long-closed socket and a long-open socket along its axial direction for insertion and mating with the control bolt. The long-open socket is located between the long-closed socket and the air outlet port. When the control bolt is inserted into the long-closed socket, the sliding valve core always remains in a state of sealing at the air outlet port. When the control bolt is inserted into the long-open socket, the sliding valve core always remains in a state of releasing the sealing at the air outlet port.

6. A one-way valve for a suction machine according to claim 1, characterized in that Also includes: The flow control nut is threaded onto the valve shaft extending to the outside of the valve body and is secured to the outer surface of the closed end seat.

7. A one-way valve for a suction machine according to claim 6, characterized in that The flow control nut is connected to a locking screw on its side thread, and the locking screw abuts against the external thread surface of the valve shaft.

8. A one-way valve for a suction machine according to claim 1, characterized in that, The pressure regulating structure includes: a pressure seat fixed to one end of the valve shaft extending out of the valve body, and the pressure seat is connected to the outer side of the closed end seat by one or more pressure tension spring assemblies.

9. A one-way valve for a suction machine according to claim 8, characterised in that, The pressure spring assembly includes: a fixed seat plate fixed to the outer side of the closed end seat, the fixed seat plate being connected to a movable seat plate via a tension spring, a short shaft on the movable seat plate being inserted into a longitudinal insertion hole in the pressure seat, and a threaded transverse screw on the pressure seat being inserted into a transverse through hole on the side of the short shaft.

10. A pipe structure comprising a one-way valve of a suction machine according to any one of claims 1 to 9, characterized in that, Also includes: An intake pipe connected to the intake port of a one-way valve and an outlet pipe connected to the outlet port of a one-way valve.

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